Build your own arduino car

For DIY enthusiasts, it is possible to build an Arduino car using more or less the same principles as before, without needing the pre-made chassis presented in China.

wheelbase: 5.32 inches - Maximum support width: 5.51 inches - Support length: 9 inches

Additional material, modules and components used for building the car:

We will be using an Arduino Uno board, onto which we will attach an L298P motor shield with a built-in buzzer. This shield will have the necessary connections for the servo motor (steering) and the two motors.

Rear-mounted motors with mounting brackets and wheels included

We modify the front wheels by using 2 small ball bearings per wheel to fix them to the steering bar.

- An Arduino UNO R3 or similar board

- An L298P motor shield with integrated buzzer and dedicated connections for the servo and the two motors

- A quarter-inch breadboard for the HC-05 Bluetooth module and the small test button

- An HC-05 Bluetooth module

- An MG 996R servo with cables and accessories (arms and screws) to control the front steering (We attach it under the board used as a base in front of the steering bar)

- Two motors to power the rear wheels

- Four wheels

The two front wheels will be reversed, drilled, and modified with two mini-bearings that will fit onto the steering bar axles.

Suitable nuts and washers will be needed

The rear wheels are attached with hexagonal brass brackets supplied with the motors and an external screw.

- 4 mini ball bearings 0,196 x 0,43 x 0,157 inches (2 per front wheel)

- Complete pre-assembled steering rod (5,51 inches wheel spacing)

- One steering linkage

- One holder for 3 18650 Li-ion lithium batteries

- Three 3.7-volt 18650 Li-ion rechargeable batteries

- One main switch

- Three 1KΩ resistors, one 220Ω resistor, one blue LED, white LEDs for the front, red LEDs for the rear

- Colored wires, jumpers for the various connections between all these components

- The bracket will be cut from a 1 cm thick sheet of plywood

Allow a spacing of 5,51 inches (14 cm) between the front wheels and therefore the rear wheels to cut your support board accordingly

A link will be fixed between the servomotor and the steering bar

The Arduino B4R program will be slightly modified since we are now managing two rear motors instead of one, but the scenario remains the same, and therefore the B4A smartphone application remains exactly the same as before with the car and chassis. The test button will produce exactly the same results:

- The front wheels will turn right then left before aligning in a straight line.

- The vehicle will move forward for 3 seconds and then backward for 3 seconds.

- The installed lights and the integrated buzzer will turn on and off several times.

A prototype created using DIY methods, in working order.

General diagram of the connections between the various components of the Arduino car

Video >>>  TESTS yellow button and Bluetooth control